CLO Tools Explained, In 2 Mins- Free Sewing 

This series of videos explain the gist of what each tool in the CLO 3D toolbar is used for and how it works. All videos in this series are under 2 minutes.
This one explains Free Sewing, Hotkey M, a tool used to garments together, regardless of segment point placement. It is the most commonly used, useful sewing tool.